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N241 Remark Code: Invalid Review Organization Approval

N241 means the approval from a review organization that accompanied the claim was incomplete or invalid. The payer found an approval, but it did not match the service, dates, provider, or other details on the claim, or it lacked required information.

Code: N241 (RARC N241)
Status: Active In use since August 1, 2004; last modified February 29, 2008.
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): The service was denied or held because the approval could not be applied. The provider resolves it; the patient is not liable.
Official description: Incomplete/invalid review organization approval.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N241 means

N241 sits on the other side of N175. Here, the review organization’s approval exists and was referenced, but the payer could not use it. The details on the approval and the claim do not line up, or the approval itself is missing something the payer requires. It commonly comes with CARC 198 or CARC 16.

Mismatches to look for

Reviewing the approval and claim side by side usually reveals the gap:

Number: The approval reference in box 23 (or the 837 prior authorization field) has a typo or is a different reference, such as a case number instead of the approval number.
Service: The approved code differs from the billed code, for example after the surgeon changed the approach.
Dates: The service fell before the approval’s start date or after it expired.
Quantity: More visits, units, or days were billed than approved.
Provider: The approval was issued to another facility or clinician.

How to fix it

Pull the approval letter or portal record and compare every field with the claim.
If the claim is wrong, correct it and submit a replacement with resubmission code 7 and the original claim number.
If the care differed from the approval, contact the review organization to request an amendment, providing clinical justification.
After the approval is updated, ask the payer to reprocess or resubmit as instructed.
If the organisation declines to amend, consider an appeal with records showing why the change was necessary.

How to prevent it

Store approvals in a structured way, linked to the scheduled service, so claim data is pulled from the approval rather than typed in. When a procedure changes on the day, alert the authorization team so it can update the approval promptly. See authorization and referral denials for more.

Codes that may appear with N241

CO-198 (Precertification/notification/authorization/pre-treatment exceeded.): The approval or authorization was exceeded, such as more units or days than approved.
CO-16 (Claim/service lacks information or has submission/billing error(s).): The claim contains invalid information about the approval.
CO-197 (Precertification/authorization/notification/pre-treatment absent.): The payer could not link a valid approval, so treats authorization as absent.

N175 (Missing review organization approval.): The review organization approval was missing entirely.
N54 (Claim information is inconsistent with pre-certified/authorized services.): Claim information is inconsistent with pre-certified or authorized services.
N188 (The approved level of care does not match the procedure code submitted.): The approved level of care does not match the procedure code submitted.

N241 FAQ

What makes a review approval invalid?

The approval number is wrong or truncated, the service or code differs from what was approved, dates of service fall outside the approved window, or the approval was issued to a different provider or facility.

Can the review organization amend the approval?

Often, if contacted promptly with the reason for the change, such as an added procedure or a shifted date. Rules vary by organisation.

Should I correct the claim or the approval?

Whichever is wrong. If the claim misreports the approval, correct the claim. If the care changed after approval, ask the review organization to update it.

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